Toe/Camber

[AndreasW]

Can someone tell good values ​​for toe and camber settings?

[V8Dom]

Racing or road?

[AndreasW]

Roadracing :-)

[macgtech]

The build manual states the following which is a pretty good starting point, and unless you are doing a lot of track work I don't see the need to wander from these very much, you would be better off playing with the damping to get where you want to be:

Toe in front 2mm overall
Toe in rear 2mm overall
Camber front 1 - 1.5` negative
Camber rear 0 - 0.5
Ride height front 110mm
Ride height rear 160mm

The ride heights, or to be exact, keeping the 50mm difference (at least) between front and rear is important. You can add more front camber if you want a bit more cornering force but this will affect braking ability and wear out your tyres more quickly. The rear's do not need much camber as they are so wide. We tend to run toe out on the front to increase the feel of the steering and reduce understeer. Always run toe in on the rear, never toe out.

Jonny

[dandare]

Where do you measure the 2mm for toe-in from?

[macgtech]

dandare said:

Where do you measure the 2mm for toe-in from?

Outside diameter of the wheel rims. It is worth spinning the wheel with a dial indicator against the rim if you have any doubts as to the 'trueness' of the wheel, although we have never found an issue so far, unless a wheel has had an impact. The tyres are sometimes miles out so you should never use them.

[AndreasW]

macgtech said:

Ride height front 110mm
Ride height rear 160mm

The ride heights, or to be exact, keeping the 50mm difference (at least) between front and rear is important.

Thank you for the detailed answer(s).
(I should probably get a build manual.)

With respect to the ride height / ground clearance.
At what points I should measure the ride height?

a) centrally relative to the mounting brackets of the wishbone (on the bottom edge of the frame).
b) at the front and rear ends (bottom edge) of the frame.
c) ...

[ultimichael]

Hi Michael,

at the centerline of the wheels , bottom edge of the the frame.
Does that mean you can drive the car in the foreseeable future.

Michael

[AndreasW]

ultimichael said:

Does that mean you can drive the car in the foreseeable future.

I've already done :-). (I live in the industrial area, there is nothing doing at night and on weekends.)

However, I had not installed the right rear dampers/springs (extreme preload) which results in almost no grip.
Today I got the right ones and try to set everything.

I'll get next week temporary license plates and make my first trip.

[SpiritedDriver]

I took my sport up to the local alignment centre today, lady bank tyres

after little head scratching as there machine is in degrees minutes and seconds, not mm they finally measure and aligned up.

The car has been a little skittish under braking and I can see why also rears are totally straight.



I will get the ride height sorted first with me in the car (110Kg ) then will take the car back once Ultima email the correct settings for the Ultima Sport.

[SpiritedDriver]

AndreasW said:

macgtech said:

Ride height front 110mm
Ride height rear 160mm

The ride heights, or to be exact, keeping the 50mm difference (at least) between front and rear is important.

Thank you for the detailed answer(s).
(I should probably get a build manual.)

With respect to the ride height / ground clearance.
At what points I should measure the ride height?

a) centrally relative to the mounting brackets of the wishbone (on the bottom edge of the frame).
b) at the front and rear ends (bottom edge) of the frame.
c) ...

Or to quote the factory the foremost and rearmost chassis members

I shall be doing just this next

[2001ultima]

I have the same question, where do you measure from and to?

a) centrally relative to the mounting brackets of the wishbone (on the bottom edge of the frame).
b) at the front and rear ends (bottom edge) of the frame.
c) ...

Thanks, Jim

[Steve_D]

The measurements should be from the underside of the chassis in line with the wheels...in effect under the axle line.

Steve